[llvm] [SLP][REVEC] Make shufflevector can be vectorized with ReorderIndices and ReuseShuffleIndices. (PR #114965)

[Alexey Bataev via llvm-commits]

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@@ -82,3 +82,40 @@ entry:
   store <4 x i32> %4, ptr %8, align 4
   ret void
 }
+
+define void @test4(ptr %in) {
+; CHECK-LABEL: @test4(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LABEL0:%.*]]
+; CHECK:       label0:
+; CHECK-NEXT:    br label [[LABEL2:%.*]]
+; CHECK:       label1:
+; CHECK-NEXT:    br label [[LABEL2]]
+; CHECK:       label2:
+; CHECK-NEXT:    br label [[LABEL0]]
+;
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alexey-bataev wrote:

Better to have a test, which generate some meaningful code

https://github.com/llvm/llvm-project/pull/114965